I’m geniounly curious because the way I treat bookmarks is that they are temporary links I wanna go back to, so they all end up being deleted sooner rather than later. When I want to visit a website I just type in the website’s name in my browser and either let autocomplete do its magic, or just let it take me to Google where I tap on the first link. The idea of keeping bookmarks saved and organized/tagged is alien to me.
That being said, having clear-text data would allow features like an API on publicly shared pages/blocks, to use Notion as a CMS. I have seen some attempts [1] at reverse-engineering their internal API, but an official one on a paid plan could be a nice addition.